[SignalOne] Present from Mouser

[jerry]

All,

Just arrived - a stick of 5 LM380 audio amplifiers.  I am expecting an 
LM380 card from K5OG - thanks, Fred!  But for the nonce, I think I'll 
dead-bug one on a piece of single-sided PC board stock.  These
are the 14-pin LM380's.  The middle three pins on both sides are all 
grounds, and also conduct heat out
to the substrate.

   I have totally depopulated an area of the power supply card, and I can 
glue the single-sided PC
board stock right to the board.  I'm thinking just a few dots of 
electronics-grade silicone - so
in the future I can pry it off if needed.

   The LM380 can run direct off +15V.  To bad it's not +/-10V - I'd be 
able to go DC coupled for
the output.  +/- 15V is above the absolute maximum rating of the chip.

   With a working audio amplifier, I think I'll be ready to put the case 
back on!

   One complication:  What about anti-vox?  The original setup was audio 
from a winding on the output
transformer.  With no output transformer, there's no winding, right?   I 
suppose I could couple the low impedance output of the amp to the 
low-impedance "output" winding of the transformer, but I wonder what 
that will do to the frequency response of the system?  I'd honestly 
rather not have a transformer in
there at all if I can help it.

                        - Jerry, KF6VB